1 2 3 4 5 6 7

rust diseases or powdery mildew (8).

In a 1998 trial conducted at the Rutgers, Snyder Research and Extension Farm, Procure®50WS
treatments increased size significantly when compared to Nova
®40W and the untreated control in
packout of fruit between 3.00" and 3.25". These results confirm reports that by utilizing Procure
50WS for early season disease control may result in a shift of packout grades to the larger grades (1).

Materials and Methods:

Experiment 1

Table 1: Treatments for the Snyder Farm Study






Untreated control

Procure®50WS @10 oz/a


Manzate®200DF @1 lb/100


Flint[TM] 50W

@3.2 oz/a

@2 oz/a

Vanguard[TM] 75W @5 oz/a

A ten-year-old block of Empire apples, on
M26, trained to a central leader system was
used to conduct this experiment at the Rutgers
University, Snyder Research and Extension
Farm in 1999 (photo 1). This trial was
conducted in a randomized complete block
design with seven replications and single tree

Tree row volume (TRV) was established at 250
gallons per acre dilute (6). The treatments
were applied at 1.5x concentrate (165.3 gpa)
using a 400 gallon Rears model Pull-Blast
airblast sprayer retrofitted with a 10' tower, that
utilized 15 nozzles per side to apply the
treatments. Ceramic TeeJet D2 and D4 disks
with size 25 cores were alternated along the
spray manifold to produce a uniform spray
pattern from top to bottom. The sprayer was
equipped with a constant velocity centrifugal
pump that operates at 170 psi. Output of the
nozzles at this constant pressure was calibrated
to 0.712 gpm per nozzle for the D4/25's and
0.395 gpm per nozzle for the D2/25's.

IMAGE Imgs/99procurereport02.gif

Forward ground speed of the tractor was calibrated to 2.56 mph, and the travel time for each tree was
3.2 seconds per side, for a total of 6.4 seconds/tree per application. High operating pressures and ball
valves in the nozzle bodies assured proper nozzle shut-off, which prevented possible overspray
contamination between treatments.

1999 Procure®50WS Report